“I have patients who are very high-profile individuals — physicians in practice, people who are politicians” who don’t want their real names reported, said Dr. Dan Berger, medical director of NorthStar Healthcare in Chicago’s Lincoln Park. In a 2005 security breach in Palm Beach County, Fla., the names of 6,500 HIV and AIDS patients were mistakenly e-mailed to 800 county health workers. Other security breaches have occurred in California and Kentucky.